After hearing a series of toilet related humor mocking Howard's malfunctioning space toilet, Sheldon realizes that each additional joke is just as funny as the previous ones. He jokingly remarks that there is "no law of diminishing comedic returns with space poop."
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Sheldon was told by the university that he needs to take a sexual harassment seminar online.
Raj is upset about being along on Valentine's Day. Howard, however, is happy with his girlfriend.
